JPH02259224A - Exhaust purifying device for internal combustion engine with turbocharger - Google Patents
Exhaust purifying device for internal combustion engine with turbochargerInfo
- Publication number
- JPH02259224A JPH02259224A JP7972489A JP7972489A JPH02259224A JP H02259224 A JPH02259224 A JP H02259224A JP 7972489 A JP7972489 A JP 7972489A JP 7972489 A JP7972489 A JP 7972489A JP H02259224 A JPH02259224 A JP H02259224A
- Authority
- JP
- Japan
- Prior art keywords
- passage
- exhaust
- turbocharger
- turbine
- end side
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 30
- 239000003054 catalyst Substances 0.000 claims abstract description 34
- 239000002699 waste material Substances 0.000 claims abstract description 14
- 238000000746 purification Methods 0.000 claims description 37
- 238000011144 upstream manufacturing Methods 0.000 description 8
- 239000000446 fuel Substances 0.000 description 6
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Exhaust Gas After Treatment (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明はターボチャージャ付内燃機関の排気浄化装置
に係り、特に既存の通路や装置と別途に新たな通路や装
置の追加付設を要することなく排気浄化装置を構成し得
て、これにより小型化を図り得てコスト低減を果たし得
るターボチャージャ付内燃機関の排気浄化装置に関する
。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an exhaust gas purification device for a turbocharged internal combustion engine, and in particular, it does not require the installation of new passages or devices in addition to existing passages or devices. The present invention relates to an exhaust gas purification device for an internal combustion engine with a turbocharger, which can be configured as an exhaust gas purification device, thereby achieving downsizing and cost reduction.
排気エネルギを利用して吸気を圧送するターボチャージ
ャを備えたターボチャージャ付内燃機関においては、過
給圧が上昇し過ぎると、ターボチャージャや内燃機関の
損傷を招くことになる。そこで、ターボチャージャ付内
燃機関においては、過給圧が設定値に達した際に、ター
ボチャージャのコンプレッサ下流側の吸気の一部をコン
プレッサ上流側にリリーフさせ、過給圧が設定値を越え
ないように制御するものがある。あるいは、過給圧が設
定値に達した際に、ターボチャージャのタービン上流側
の排気の一部をタービン下流側にバイパスさせ、過給圧
が設定値を越えないように制御するものがある。In a turbocharged internal combustion engine equipped with a turbocharger that pumps intake air using exhaust energy, if the supercharging pressure increases too much, the turbocharger and the internal combustion engine will be damaged. Therefore, in a turbocharged internal combustion engine, when the boost pressure reaches the set value, a portion of the intake air downstream of the turbocharger compressor is relieved to the upstream side of the compressor so that the boost pressure does not exceed the set value. There are things that can be controlled like this. Alternatively, when the boost pressure reaches a set value, a part of the exhaust gas on the upstream side of the turbine of the turbocharger is bypassed to the downstream side of the turbine to control the boost pressure so as not to exceed the set value.
このようなターボチャージャ付内燃機関にあって、排気
中の有害成分を除去するために、触媒物質の作用により
排気中の有害成分を無害な成分に変換する排気浄化装置
を備えたものがある。排気浄化装置としては、実開昭5
6−163712号公報や実開昭57−167213号
公報等に開示のものがある。Some of such turbocharged internal combustion engines are equipped with an exhaust purification device that converts the harmful components in the exhaust gas into harmless components by the action of a catalyst substance in order to remove the harmful components in the exhaust gas. As an exhaust purification device,
Some of these are disclosed in Japanese Utility Model Publication No. 6-163712, Japanese Utility Model Application Publication No. 57-167213, and the like.
実開昭56−163712号公報に開示のものは、ター
ボチャージャのコンプレッサ及び吸気絞り弁間の吸気通
路とタービン及び触媒体間の排気通路とを連通ずる二次
空気通路を設け、この二次空気通路をアイドリング時、
減速時、あるいは低速低負荷時に開放する流量制御装置
を設けたものである。The device disclosed in Japanese Utility Model Application Publication No. 56-163712 provides a secondary air passage that communicates the intake passage between the compressor and the intake throttle valve of the turbocharger with the exhaust passage between the turbine and the catalyst body, and this secondary air When idling in the aisle,
It is equipped with a flow control device that opens during deceleration or low speed and low load.
また、実開昭57−167213号公報に開示のものは
、第3図に示す如く、内燃機関102の吸気通路104
に燃料噴射弁106を設けるとともに排気通路10日に
触媒体110を設け、車速センサ112からの信号によ
り設定車速に達した際に燃料噴射弁106の供給する燃
料を停止して車速を制限する最高速制限装置114を設
け、前記触媒体110を迂回して排気通路108を連通
するバイパス通路116を設け、このバイパス通路11
6を前記最高速制限装置114による最高速制限時に開
放する弁装置118を設けたものである。Further, as shown in FIG.
A fuel injection valve 106 is provided in the exhaust passage 10, and a catalyst body 110 is provided in the exhaust passage 10, and when a set vehicle speed is reached based on a signal from the vehicle speed sensor 112, the fuel supplied by the fuel injection valve 106 is stopped to limit the vehicle speed. A high-speed restriction device 114 is provided, a bypass passage 116 is provided that bypasses the catalyst body 110 and communicates with the exhaust passage 108, and this bypass passage 11
6 is provided with a valve device 118 that opens when the maximum speed is limited by the maximum speed limiter 114.
ところが、前記従来の排気浄化装置は、既存の通路と別
途に新たな通路として内燃機関を迂回する二次空気通路
や触媒体を迂回するバイパス通路を設け、また、既存の
装置と別途に新たな装置として流量制御装置や車速セン
サ・弁装置等を設けていることにより、別途に新たな配
管スペースや配置スペースを確保しなければならない問
題がある。このため、通路や装置の追加付設による大形
化を招く不都合があるとともにコストの上昇を招く不都
合があった。However, the conventional exhaust purification device has a secondary air passage that bypasses the internal combustion engine and a bypass passage that bypasses the catalyst body as a new passage separately from the existing passage, and also has a new passage that is separate from the existing passage. Since a flow rate control device, a vehicle speed sensor, a valve device, etc. are provided as devices, there is a problem in that new piping space and arrangement space must be secured separately. For this reason, there is an inconvenience that the size is increased due to the additional installation of passages and devices, and there is an inconvenience that this increases the cost.
そこで、この発明の目的は、既存の通路や装置と別途に
新たな通路や装置の追加付設を要することなく排気浄化
装置を構成し得て、これにより小型化を図り得てコスト
低減を果たし得るターボチャージャ付内燃機関の排気浄
化装置を実現することにある。Therefore, an object of the present invention is to configure an exhaust purification device without requiring the addition of new passages or devices in addition to existing passages or devices, thereby achieving miniaturization and cost reduction. The object of the present invention is to realize an exhaust purification device for an internal combustion engine with a turbocharger.
この目的を達成するためにこの発明は、ターボチャージ
ャのタービンを迂回して排気通路を連通ずるバイパス通
路を設けるとともにこのバイパス通路に過給圧を制御す
べく開閉動作されるウェイストゲート弁を設けたターボ
チャージャ付内燃機関において、前記タービンの出口に
始端側を連通ずる第1通路とこの第1通路の終端側に始
端側を連通ずるとともにこの第1通路の外周を通り前記
ウェイストゲート弁下流側のバイパス通路に終端側を連
通ずる断面環筒状の第2通路とからなる排気浄化通路を
設け、この排気浄化通路の前記第2通路に触媒体を設け
たことを特徴とする。In order to achieve this object, the present invention provides a bypass passage that bypasses the turbine of the turbocharger and communicates with the exhaust passage, and also provides a wastegate valve that is opened and closed to control the boost pressure in the bypass passage. In an internal combustion engine with a turbocharger, a first passage whose starting end side communicates with the outlet of the turbine, a starting end side which communicates with the terminal end side of the first passage, and a downstream side of the waste gate valve that passes through the outer periphery of the first passage. The present invention is characterized in that an exhaust purification passage including a second passage having an annular cylindrical cross section and communicating with the bypass passage at its terminal end is provided, and a catalyst body is provided in the second passage of the exhaust purification passage.
この発明の構成によれば、タービンの出口に始端側を連
通ずる第1通路とこの第1通路の終端側に始端側を連通
ずるとともにこの第1通路の外周を通りウェイストゲー
ト弁下流側のバイパス通路に終端側を連通ずる断面環筒
状の第2通路とからなる排気浄化通路の前記第2通路に
触媒体を設けたことによって、既存の通路や装置と別途
に新たな通路や装置の追加付設を要せず、従って、別途
に新たな配管スペースや配置スペースを確保する必要が
ない。According to the configuration of the present invention, the first passage communicates the starting end side with the outlet of the turbine, the starting end side communicates with the terminal end side of the first passage, and the bypass passes through the outer periphery of the first passage and is downstream of the waste gate valve. By providing a catalyst body in the second passage of the exhaust purification passage, which is composed of a second passage with an annular cylindrical cross section that communicates with the passage at its terminal end, new passages and devices can be added separately from the existing passages and devices. No additional installation is required, so there is no need to separately secure new piping space or arrangement space.
以下図面に基づいてこの発明の実施例を詳細に説明する
。Embodiments of the present invention will be described in detail below based on the drawings.
第1・2図は、この発明の実施例を示すものである。第
1図において、2はターボチャージャ付内燃機関、4は
吸気管、6は排気管、8はターボチャージャである。1 and 2 show an embodiment of the invention. In FIG. 1, 2 is an internal combustion engine with a turbocharger, 4 is an intake pipe, 6 is an exhaust pipe, and 8 is a turbocharger.
ターボチャージャ付内燃機関2の燃焼室10には、吸気
管4により吸気通路12が連通されているとともに、排
気管6により排気通路14が連通されている。前記ター
ボチャージャ8は、吸気通路12に臨ませて設けたコン
プレフサ16を排気通路14に臨ませて設けたタービン
18により回転させ、吸気を圧送する。なお、符号20
は点火プラグである。An intake passage 12 is communicated with a combustion chamber 10 of the turbocharged internal combustion engine 2 through an intake pipe 4, and an exhaust passage 14 is communicated with an exhaust pipe 6. The turbocharger 8 rotates a compressor 16 provided facing the intake passage 12 by a turbine 18 provided facing the exhaust passage 14, and pumps intake air. In addition, the code 20
is a spark plug.
前記コンプレッサ16の上流側の吸気通路12である第
1吸気通路12−1は、始端側をエアクリーナ22に連
通ずるとともに終端側をコンプレッサ16の入口24に
連通し、途中にエアフローメータ26を設けている。ま
た、コンプレッサ16の下流側の吸気通路12である第
2吸気通路12−2は、始端側をコンプレッサ16の出
口28に連通するとともに終端側をターボチャージャ付
内燃機関2の燃焼室10に連通し、途中に吸気絞り弁3
0を設けるとともに燃焼室1oに指向させて燃料噴射弁
32を設けている。The first intake passage 12-1, which is the intake passage 12 on the upstream side of the compressor 16, has a starting end communicating with the air cleaner 22, a terminal end communicating with the inlet 24 of the compressor 16, and an air flow meter 26 provided in the middle. There is. Further, the second intake passage 12 - 2 , which is the intake passage 12 on the downstream side of the compressor 16 , has a starting end communicating with the outlet 28 of the compressor 16 and a terminal end communicating with the combustion chamber 10 of the turbocharged internal combustion engine 2 . , Intake throttle valve 3 in the middle
0 is provided, and a fuel injection valve 32 is provided so as to be oriented toward the combustion chamber 1o.
前記タービン18の上流側の排気通路14である第1排
気通路14−1は、始端側をターボチャージャ付内燃機
関2の燃焼室10に連通ずるとともに終端側をタービン
18の入口34に連通している。また、タービン18の
下流側の排気通路14である第2排気通路14−2は、
始端側をタービン18の出口36に連通ずるとともに終
端側を外気に開放し、途中にマフラ38を設けている。The first exhaust passage 14-1, which is the exhaust passage 14 on the upstream side of the turbine 18, has a starting end communicating with the combustion chamber 10 of the turbocharged internal combustion engine 2, and a terminal end communicating with the inlet 34 of the turbine 18. There is. Further, the second exhaust passage 14-2, which is the exhaust passage 14 on the downstream side of the turbine 18, is
The starting end side is communicated with the outlet 36 of the turbine 18, and the terminal end side is open to the outside air, and a muffler 38 is provided in the middle.
前記ターボチャージャ8のタービン18を迂回して、第
1排気通路14−1と第2排気通路14−2とを連通ず
るバイパス通路40を設ける。バイパス通路40は、タ
ービン18の上流側の第1排気通路14−1に設けた入
口42に始端側を連通させ、タービン18の下流側の第
2排気通路14−2に設けた出口44に終端側を連通さ
せて設ける。このバイパス通路40には、過給圧を制御
すべく開閉動作されるウェイストゲート弁46を設けて
いる。ウェイストゲート弁46は、第1排気通路14−
1の入口42に設けられている。A bypass passage 40 is provided that bypasses the turbine 18 of the turbocharger 8 and communicates the first exhaust passage 14-1 and the second exhaust passage 14-2. The bypass passage 40 has a starting end communicating with an inlet 42 provided in a first exhaust passage 14-1 on the upstream side of the turbine 18, and a terminal end communicating with an outlet 44 provided in a second exhaust passage 14-2 on the downstream side of the turbine 18. Provided with the sides communicating. This bypass passage 40 is provided with a wastegate valve 46 that is opened and closed to control the supercharging pressure. The waste gate valve 46 is connected to the first exhaust passage 14-
It is provided at the entrance 42 of 1.
ウェイストゲート弁44は、アクチュエータ48により
開閉動作される。アクチュエータ48は、本体50内に
ダイヤフラム52により圧力室54を区画形成している
。ダイヤフラム52は、ロフト56により前記ウェイス
トゲート弁46に連絡されている。前記圧力室54は、
導圧管58の導圧通路60によりコンプレッサ16下流
側の第2吸気通路1.2−2に連通されている。また、
ダイヤフラム52には、圧力室54を縮小する方向に付
勢するバネ62を弾圧して設けている。The wastegate valve 44 is opened and closed by an actuator 48. The actuator 48 has a pressure chamber 54 defined within the main body 50 by a diaphragm 52 . Diaphragm 52 is connected to the wastegate valve 46 by a loft 56. The pressure chamber 54 is
The pressure guiding passage 60 of the pressure guiding pipe 58 communicates with the second intake passage 1.2-2 on the downstream side of the compressor 16. Also,
The diaphragm 52 is provided with a biasing spring 62 that biases the pressure chamber 54 in a direction to contract it.
これにより、アクチュエータ48は、圧力室54に作用
する過給圧とバネ62の付勢力とによりロフト56を押
進・引退勤させ、このロッド56の押進・引退勤により
ウェイストゲート弁44を開閉動作させて排気の一部を
バイパスさせ、過給圧を設定値に制御する。Thereby, the actuator 48 pushes and retires the loft 56 by the supercharging pressure acting on the pressure chamber 54 and the biasing force of the spring 62, and opens and closes the waste gate valve 44 by pushing and retiring the rod 56. It operates to bypass part of the exhaust gas and control the boost pressure to the set value.
このターボチャージャ付内燃機関2には、排気中の有害
成分を除去するために、排気浄化装置64を設けている
。排気浄化装置64は、排気浄化通路66を設けている
。排気浄化通路66は、前記タービン18の出口36に
始端側を連通ずる第1通路66−1とこの第1通路66
−1の終端側に始端側を連通ずるとともにこの第1通路
66−1の外周を通り前記ウェイストゲート弁46下流
側のバイパス通路40に終端側を連通ずる断面環筒状の
第2通路66−2とからなり、この排気浄化通路66の
前記第2通路66−2に断面環筒状の触媒体68を設け
ている。This turbocharged internal combustion engine 2 is provided with an exhaust gas purification device 64 in order to remove harmful components from the exhaust gas. The exhaust purification device 64 is provided with an exhaust purification passage 66. The exhaust purification passage 66 includes a first passage 66 - 1 whose starting end side communicates with the outlet 36 of the turbine 18 and this first passage 66 .
- A second passage 66-1 having an annular cylindrical cross section, whose starting end communicates with the terminal end of the first passage 66-1, and whose terminal end communicates with the bypass passage 40 on the downstream side of the waste gate valve 46 through the outer periphery of the first passage 66-1. 2, and a catalyst body 68 having an annular cylindrical cross section is provided in the second passage 66-2 of this exhaust purification passage 66.
即ち、排気浄化装置64は、第2図に示す如く、基体7
0及び蓋体72と内筒74及び外筒76とを有している
。基体70には、タービン18の上流側の第1排気通路
14−1に設けた入口42に連通ずるとともにタービン
18の下流側の第2排気通路14−2に設けた出口44
に連通ずるバイパス通路40が形成されている。また、
この基体70には、第1通路66−1の一部が形成され
ているとともに、この第1通路66−1の外周にウェイ
ストゲート弁46下流側のバイパス通路40に終端側を
連通ずる断面環筒状の第2通路66−2の一部が形成さ
れている。That is, the exhaust purification device 64 has a base body 7 as shown in FIG.
0, a lid body 72, an inner cylinder 74, and an outer cylinder 76. The base body 70 has an outlet 44 that communicates with an inlet 42 provided in a first exhaust passage 14 - 1 on the upstream side of the turbine 18 and an outlet 44 provided in a second exhaust passage 14 - 2 on the downstream side of the turbine 18 .
A bypass passage 40 is formed which communicates with the. Also,
A part of the first passage 66-1 is formed in the base body 70, and a cross-sectional ring whose terminal end communicates with the bypass passage 40 on the downstream side of the waste gate valve 46 is formed on the outer periphery of the first passage 66-1. A part of the cylindrical second passage 66-2 is formed.
前記内筒74は、一端側を溶接等により前記基体70に
固定されて第1通路66−1の残部を形成するとともに
、他端側を開放端としている。また、前記外筒76は、
この内筒74を包囲して一端側を溶接等により前記基体
70に固定されて第2通路66−2の残部を形成すると
ともに、他端側を溶接等により前記蓋体72に固定され
て第2通路66−2の始端側を第1通路66−1の終端
側に連通している。この内筒74の外周と外筒76の内
周とにより形成される第2通路66−2には、断面環筒
状の前記触媒体68を設けている。The inner cylinder 74 has one end fixed to the base body 70 by welding or the like to form the remainder of the first passage 66-1, and the other end is an open end. Further, the outer cylinder 76 is
Surrounding this inner cylinder 74, one end side is fixed to the base body 70 by welding or the like to form the remainder of the second passage 66-2, and the other end side is fixed to the lid body 72 by welding or the like to form the second passage 66-2. The starting end side of the second passage 66-2 is communicated with the terminal end side of the first passage 66-1. A second passage 66-2 formed by the outer periphery of the inner cylinder 74 and the inner periphery of the outer cylinder 76 is provided with the catalyst body 68 having an annular cylindrical cross section.
この触媒体68は、例えば、耐熱鋼からなる平板と波板
とを重合して渦巻状に捲装することにより多数の排気流
通孔を形成した担体に触媒を担持させて断面環筒状に構
成した金属触媒体である。あるいは、触媒体68は、多
数の排気流通孔を形成した耐熱性セラミック担体に触媒
を担持させて断面環筒状に構成したセラミック触媒体と
することもできる。The catalyst body 68 is configured to have an annular cylindrical cross section by supporting a catalyst on a carrier in which a large number of exhaust flow holes are formed by, for example, superimposing a flat plate and a corrugated plate made of heat-resistant steel and winding them in a spiral shape. It is a metal catalyst body. Alternatively, the catalyst body 68 may be a ceramic catalyst body having an annular cylindrical cross section by supporting a catalyst on a heat-resistant ceramic carrier in which a large number of exhaust gas flow holes are formed.
このように構成された排気浄化装置64は、タービン1
8の上流側の第1排気通路14−1に設けた入口42に
バイパス通路40の始端側を連通させて基体70をター
ボチャージャ8の本体78にボルト等の固定具80によ
り固定するとともに、タービン18の下流側の第2排気
通路14−2に設けた出口44にバイパス通路40の終
端側を連通させて基体70を排気管6にボルト等の固定
具(図示せず)により固定する。即ち、排気浄化装R6
2は、ターボチャージャ8に対して固定具80により着
脱可能となっている。The exhaust gas purification device 64 configured in this way is installed in the turbine 1.
The starting end side of the bypass passage 40 is connected to the inlet 42 provided in the first exhaust passage 14-1 on the upstream side of the turbocharger 8, and the base body 70 is fixed to the main body 78 of the turbocharger 8 with a fixing member 80 such as a bolt. The terminal end side of the bypass passage 40 is communicated with the outlet 44 provided in the second exhaust passage 14-2 on the downstream side of the exhaust pipe 18, and the base body 70 is fixed to the exhaust pipe 6 with a fixing device such as a bolt (not shown). That is, exhaust purification system R6
2 can be attached to and detached from the turbocharger 8 using a fixture 80.
これにより、排気浄化装置64は、タービン18の出口
36に始端側を連通ずる第1通路66−1とこの第1通
路66−1の終端側に始端側を連通ずるとともにこの第
1通路66−1の外周を通り前記ウェイストゲート弁4
6下流側のバイパス通路40に終端側を連通ずる断面環
筒状の第2通路66−2とからなる排気浄化通路66を
設け、この排気浄化通路66の前記第2通路66−2に
断面環筒状の触媒体68を設けている。As a result, the exhaust purification device 64 has a first passage 66-1 whose starting end side communicates with the outlet 36 of the turbine 18, a starting end side which communicates with the terminal end side of this first passage 66-1, and this first passage 66-1. 1 through the outer periphery of the wastegate valve 4
6. An exhaust purification passage 66 consisting of a second passage 66-2 having an annular cylindrical cross section and communicating with the downstream side bypass passage 40 is provided. A cylindrical catalyst body 68 is provided.
次に作用を説明する。Next, the action will be explained.
ターボチャージャ付内燃機関2のエアクリーナ22から
第1吸気通路12−1に取入れられた空気は、エアフロ
ーメータ26により空気量を検出され、ターボチャージ
ャ8のコンプレッサ16の回転により第2吸気通路12
−2に圧送され、吸気絞り弁30により調量され、燃料
噴射弁32から噴射される燃料とともに燃焼室10に供
給される。燃焼室10で燃焼生成された排気は、第1排
気通路14−1に排出され、入口34から流入してター
ビン18を回転させる。The amount of air taken into the first intake passage 12-1 from the air cleaner 22 of the turbocharged internal combustion engine 2 is detected by the air flow meter 26, and the air is transferred to the second intake passage 12 by the rotation of the compressor 16 of the turbocharger 8.
-2, is metered by the intake throttle valve 30, and is supplied to the combustion chamber 10 together with fuel injected from the fuel injection valve 32. Exhaust gas generated by combustion in the combustion chamber 10 is discharged into the first exhaust passage 14-1, flows in from the inlet 34, and rotates the turbine 18.
タービン18の出口36から流出する排気は、基体70
と内筒74とにより形成される排気浄化通路66の第1
通路66−1を通り、蓋体76内で反転され、内筒74
の外周と外筒76の内周とにより形成される第2通路6
6−2を通る間に触媒体68により浄化され、基体70
に形成されるウェイストゲート弁46下流側のバイパス
通路44に流出する。バイパス通路44から第2排気通
路14−2に流出した排気は、マフラ38を介して外気
に排出される。Exhaust gas exiting the outlet 36 of the turbine 18 is directed to the base 70
The first part of the exhaust purification passage 66 formed by the and inner cylinder 74
Passes through the passage 66-1, is inverted within the lid body 76, and is opened to the inner cylinder 74.
The second passage 6 formed by the outer periphery of and the inner periphery of the outer cylinder 76
The substrate 70 is purified by the catalyst body 68 while passing through the substrate 6-2.
It flows out into the bypass passage 44 on the downstream side of the waste gate valve 46 formed in the waste gate valve 46 . The exhaust gas flowing out from the bypass passage 44 to the second exhaust passage 14-2 is discharged to the outside air via the muffler 38.
このように、タービン18の出口36に始端側を連通ず
る第1通路66−1とこの第1通路66−1の終端側に
始端側を連通ずるとともにこの第1通路66−1の外周
を通りウェイストゲート弁46下流側のバイパス通路4
4に終端側を連通ずる断面環筒状の第2通路66−2と
からなる排気浄化通路66を設け、この排気浄化通路6
6の前記第2通路66−2に触媒体68を設けたことに
よって、既存の通路や装置と別途に新たな通路や装置の
追加付設を要せず、従って、別途に新たな配管スペース
や配置スペースを確保する必要がな(なる。In this way, the first passage 66-1 communicates the starting end side with the outlet 36 of the turbine 18, and the starting end side communicates with the terminal end side of the first passage 66-1, and passes through the outer periphery of the first passage 66-1. Wastegate valve 46 downstream bypass passage 4
4 is provided with an exhaust purification passage 66 consisting of a second passage 66-2 having an annular cylindrical cross section communicating with the terminal end side, and this exhaust purification passage 6
By providing the catalyst body 68 in the second passage 66-2 of No. 6, there is no need to add a new passage or device in addition to the existing passage or device, and therefore, it is not necessary to additionally install a new piping space or arrangement. There is no need to secure space.
このため、既存の通路や装置と別途に新たな通路や装置
の追加付設を要することなく排気浄化装置64を構成す
ることができ、これにより小型化を図り得てコスト低減
を果たすことができる。Therefore, the exhaust gas purification device 64 can be constructed without requiring the addition of new passages or devices in addition to existing passages or devices, thereby achieving miniaturization and cost reduction.
また、ターボチャージャ付内燃機関2の高回転・高負荷
時に過給圧が設定値に達すると、アクチュエータ48に
よりウェイストゲート弁46が開放動作され、タービン
18上流側の第1排気通路14−1の排気の一部をバイ
パス通路40を介して第2排気通路14−2にバイパス
させ、過給圧が設定値を越えないように制御する。この
とき、バイパスされる排気は、触媒体68を通ることな
く第2排気通路14−2に排出され、触媒体68により
浄化された排気とともにマフラ38を介して外気に排出
される。Further, when the supercharging pressure reaches a set value when the turbocharged internal combustion engine 2 is at high speed and under high load, the wastegate valve 46 is opened by the actuator 48, and the first exhaust passage 14-1 on the upstream side of the turbine 18 is opened. A part of the exhaust gas is bypassed to the second exhaust passage 14-2 via the bypass passage 40, and the supercharging pressure is controlled so as not to exceed a set value. At this time, the bypassed exhaust gas is discharged to the second exhaust passage 14-2 without passing through the catalyst body 68, and is discharged to the outside air through the muffler 38 together with the exhaust gas purified by the catalyst body 68.
このように、ウェイストゲート弁46によりバイパスさ
れる排気が触媒体68を通ることなく排出されるため、
従来の全量を常に触媒体に通す排気浄化装置と比して高
回転・高負荷時の触媒体の温度を低下させることができ
、これにより触媒体の耐久性を向上することができる。In this way, the exhaust gas that is bypassed by the wastegate valve 46 is discharged without passing through the catalyst body 68.
Compared to conventional exhaust gas purification devices that always pass the entire exhaust gas through the catalyst body, the temperature of the catalyst body during high rotation and high load can be lowered, thereby improving the durability of the catalyst body.
さらに、ウェイストゲート弁46によりバイパスされる
排気が触媒体68を通ることなく排出されるため、高回
転・高負荷時の排圧を従来よりも低下させることができ
るので、出力の向上を果たすことができる。Furthermore, since the exhaust gas that is bypassed by the wastegate valve 46 is discharged without passing through the catalyst body 68, the exhaust pressure at high speeds and high loads can be lowered than before, resulting in improved output. I can do it.
このようにこの発明によれば、タービンの出口に始端側
を連通ずる第1通路とこの第1通路の終端側に始端側を
連通ずるとともにこの第1通路の外周を通りウェイスト
ゲート弁下流側のバイパス通路に終端側を連通ずる断面
環筒状の第2通路とからなる排気浄化通路の前記第2通
路に触媒体を設けたことによって、既存の通路や装置と
別途に新たな通路や装置の追加付設を要せず、従って、
別途に新たな配管スペースや配置スペースを確保する必
要がない。As described above, according to the present invention, the first passage communicates the starting end side with the outlet of the turbine, and the starting end side communicates with the terminal end side of the first passage, and passes through the outer periphery of the first passage and connects the downstream side of the waste gate valve. By providing a catalytic body in the second passage of the exhaust purification passage, which consists of a second passage with an annular cylindrical cross section whose terminal end communicates with the bypass passage, it is possible to create a new passage or device separately from the existing passage or device. No additional installation is required, therefore,
There is no need to separately secure new piping space or arrangement space.
これにより、既存の通路や装置と別途に新たな通路や装
置の追加付設を要することなく排気浄化装置を構成し得
るので、小型化を図り得てコスト低減を果たすことがで
きる。また、ウェイストゲート弁によりバイパスされる
排気が触媒体を通ることなく排出されるため、従来の全
量を常に触媒体に通す排気浄化装置と比して高回転・高
負荷時の触媒体の温度を低下させることができ、これに
より触媒体の耐久性を向上することができる。さらに、
ウェイストゲート弁によりバイパスされる排気が触媒体
を通ることなく排出されるため、高回転・高負荷時の排
圧を従来よりも低下させることができるので、出力の向
上を果たすことができる。As a result, the exhaust gas purification device can be configured without requiring the addition of new passages and devices in addition to existing passages and devices, so it is possible to achieve downsizing and cost reduction. In addition, since the exhaust gas bypassed by the wastegate valve is discharged without passing through the catalyst body, the temperature of the catalyst body at high speeds and high loads can be reduced compared to conventional exhaust purification devices that always pass the entire amount through the catalyst body. This can improve the durability of the catalyst. moreover,
Since the exhaust gas that is bypassed by the wastegate valve is discharged without passing through the catalyst body, the exhaust pressure at high speeds and high loads can be lowered than before, and the output can be improved.
第1・2図はこの発明の実施例を示し、第1図はターボ
チャージャ付内燃機関の排気浄化装置の概略説明図、第
2図は排気浄化装置の要部説明図である。
第3図は従来例を示す排気浄化装置の要部説明図である
。
図において、2はターボチャージャ付内燃機関、4は吸
気管、6は排気管、8はターボチャージャ、10は燃焼
室、12は吸気通路、14は排気通路、16はコンプレ
ッサ、1Bはタービン、24はコンプレッサ16の入口
、28はコンプレフサ16の出口、30は吸気絞り弁、
34はタービン18の入口、36はタービン18の出口
、4oはバイパス通路、46はウェイストゲート弁、4
8はアクチュエータ、64は排気浄化装置、66は排気
浄化通路、66−1は第1通路、66−2は第2通路、
68は触媒体、70は基体、72は蓋体、74は内筒、
76は外筒、78はターボチャージャ8の本体、80は
固定具である。
第1図
第2図1 and 2 show an embodiment of the present invention, FIG. 1 is a schematic explanatory diagram of an exhaust gas purification device for an internal combustion engine with a turbocharger, and FIG. 2 is a diagram illustrating main parts of the exhaust gas purification device. FIG. 3 is an explanatory diagram of main parts of an exhaust gas purification device showing a conventional example. In the figure, 2 is an internal combustion engine with a turbocharger, 4 is an intake pipe, 6 is an exhaust pipe, 8 is a turbocharger, 10 is a combustion chamber, 12 is an intake passage, 14 is an exhaust passage, 16 is a compressor, 1B is a turbine, 24 is the inlet of the compressor 16, 28 is the outlet of the compressor 16, 30 is the intake throttle valve,
34 is an inlet of the turbine 18, 36 is an outlet of the turbine 18, 4o is a bypass passage, 46 is a waste gate valve, 4
8 is an actuator, 64 is an exhaust purification device, 66 is an exhaust purification passage, 66-1 is a first passage, 66-2 is a second passage,
68 is a catalyst body, 70 is a base body, 72 is a lid body, 74 is an inner cylinder,
76 is an outer cylinder, 78 is a main body of the turbocharger 8, and 80 is a fixture. Figure 1 Figure 2
Claims (1)
連通するバイパス通路を設けるとともにこのバイパス通
路に過給圧を制御すべく開閉動作されるウェイストゲー
ト弁を設けたターボチャージャ付内燃機関において、前
記タービンの出口に始端側を連通する第1通路とこの第
1通路の終端側に始端側を連通するとともにこの第1通
路の外周を通り前記ウェイストゲート弁下流側のバイパ
ス通路に終端側を連通する断面環筒状の第2通路とから
なる排気浄化通路を設け、この排気浄化通路の前記第2
通路に触媒体を設けたことを特徴とするターボチャージ
ャ付内燃機関の排気浄化装置。1. In an internal combustion engine with a turbocharger, which is provided with a bypass passage that bypasses the turbine of the turbocharger and communicates with the exhaust passage, and is provided with a wastegate valve that is opened and closed to control boost pressure in the bypass passage. a first passage whose starting end side communicates with the outlet of the first passage; and a cross section whose starting end side communicates with the terminal end side of the first passage, and which passes through the outer periphery of the first passage and communicates the terminal end side with a bypass passage downstream of the waste gate valve; An exhaust purification passage consisting of a second annular passage is provided, and the second passage of the exhaust purification passage is provided with an annular second passage.
An exhaust purification device for an internal combustion engine with a turbocharger, characterized in that a catalyst body is provided in a passage.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7972489A JPH02259224A (en) | 1989-03-30 | 1989-03-30 | Exhaust purifying device for internal combustion engine with turbocharger |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7972489A JPH02259224A (en) | 1989-03-30 | 1989-03-30 | Exhaust purifying device for internal combustion engine with turbocharger |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH02259224A true JPH02259224A (en) | 1990-10-22 |
Family
ID=13698148
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7972489A Pending JPH02259224A (en) | 1989-03-30 | 1989-03-30 | Exhaust purifying device for internal combustion engine with turbocharger |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH02259224A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2856735A1 (en) * | 2003-06-30 | 2004-12-31 | Renault Sa | Internal combustion engine for motor vehicle, has turbo compressor with turbine cover having outlet orifice connected to inlet of catalyst, where catalyst and compressor are fixed on cylinder block by main common support |
EP1686247A1 (en) * | 2004-12-14 | 2006-08-02 | BorgWarner Inc. | Turbocharger-Catalyst-Arrangement |
US20120291431A1 (en) * | 2011-05-18 | 2012-11-22 | GM Global Technology Operations LLC | Forced induction and exhaust system |
US20150000273A1 (en) * | 2013-06-26 | 2015-01-01 | Honeywell International Inc. | Turbocharger with annular rotary bypass valve for the turbine, and catalyst disposed in the bypass channel of the turbine housing |
US20160237883A1 (en) * | 2015-02-17 | 2016-08-18 | Electro-Motive Diesel, Inc. | Bypass mechanism for an exhaust system |
-
1989
- 1989-03-30 JP JP7972489A patent/JPH02259224A/en active Pending
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2856735A1 (en) * | 2003-06-30 | 2004-12-31 | Renault Sa | Internal combustion engine for motor vehicle, has turbo compressor with turbine cover having outlet orifice connected to inlet of catalyst, where catalyst and compressor are fixed on cylinder block by main common support |
EP1686247A1 (en) * | 2004-12-14 | 2006-08-02 | BorgWarner Inc. | Turbocharger-Catalyst-Arrangement |
US20120291431A1 (en) * | 2011-05-18 | 2012-11-22 | GM Global Technology Operations LLC | Forced induction and exhaust system |
US8528327B2 (en) * | 2011-05-18 | 2013-09-10 | GM Global Technology Operations LLC | Forced induction and exhaust system |
US20150000273A1 (en) * | 2013-06-26 | 2015-01-01 | Honeywell International Inc. | Turbocharger with annular rotary bypass valve for the turbine, and catalyst disposed in the bypass channel of the turbine housing |
US20160237883A1 (en) * | 2015-02-17 | 2016-08-18 | Electro-Motive Diesel, Inc. | Bypass mechanism for an exhaust system |
US9638098B2 (en) * | 2015-02-17 | 2017-05-02 | Electro-Motive Diesel, Inc. | Bypass mechanism for an exhaust system |
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